Meter for fluids



Get. 16, 1923. 1,470,684

E. B. CADE METER FOR FLUIDS Filed Nov. 15, 1921 EZZOJBL (0d? alifo'unuaqlll iii

' stares earner EH08 B. CADgE, OF PORTLAND, OREGON, ASSIGNOE T0 AMERICANLIQUID METER coat- PAN'L', OF WETLAND, GREGG-Iii, A CQRPOEATION OFWASHINGTON.

manna roa rrnrns.

application filled November 15, 192i. tierlal lilo. 515,1???

To all whom it may concern:

Be it known that l, Enos B. CADE, a citizen ofthe United States ofAmerica, and resident of the cit of Portland, county of Multnomah, andtate of ()regon, have invented certain new and useful Improvements inMeters for Fluids, of which the following is a specification. I

My invention relates to fluid meters of the type wherein a piston,reciprocable in a cylinder and actuating control valves by its movement,forms the metering element.

An important object is the simplification of such meters and theproduction of a meter which will be compact, easily operable andaccurate.

Further objects are to provide in such a fluid meter means forcontrolling and looking the valves in certain positions, and to provideimproved means for releasing the valves when the metering member hasreached the end of its stroke.

Another object is to provide means where- 4 by the oint of release ofthe valve may be adjusted.

My invention comprises those novel parts and combinations thereof whichare shown in the accompanying drawings, described in the specificationand particularly defined by the claims terminating the same.

In the accompanying drawings I have shown my invention in the form whichis now preferred by me. 1

Figure 1 is a section through my meter, taken on a horizontal plane.

Figures 2 and 3 are, respectively, sections on lines 2--2 and 3-3 ofFigure 1.

My piston is of the general type described above, the present formcomprising a cylinder 1, closed by two heads 10, the cylinder and headshaving intake passages 11 and exhaust passages 12, and a piston 2reciprocable withinthe cylinder to form the inetering element. Controlvalves 3, of which I have shown one at each end, by their rover-- salallord communication alternately between the intake passage 11 orexhaust passage 12 and its respective endof the cylinder.

The valves 3 l have shown as tubular valves having the intake ports 31registering- With intake passages 1-3 in the fixed bushing l5, andhaving exhaust ports 32registrable with exhaust passages 14 in thebushing 15. The two valves are secured upon opposite ends of the rod 33,the valves being axially alined. Aspring 35 is interposed between eachvalve and the piston 2 and is compressible as the piston advances, andupon release of the valve holding meansto be later described, operatesvto reverse the position of its respective valve 3 and the valvecontrolling mechanism.

The valve controlling mechanism includes, for each valve, one or moredogs 4, of which I have shown two for each valve, these beingpivoted inthe cylinder head 10, or in a cap it secured therein. These dogs areinterposed between the valve 3 and a pin 5 which extends coaxially ofthe valve, and preferably lie. within the confines of the valve. The pin5 may be provided with an enlarged head 50, and this head is engageableby cam surfaces 45 on the dogs 4. The dogs are also provided with camsurfaces 43 which are engageahle with the outer end of the valve 3. Thepin 5iis wholly independent of the dogs 4, whereby it maybe adjusted,and whereby parts may be easily removed'for inspection or repair..

The pin 5 is reciprocable relative to the till the pin so as to beadjustable thereon. ll

provide also a spring 52 which tends always to retainthe in 5 retractedwithin the socket 36 of the re 33.

As the piston 2 advances toward oneend, toward the right in Figure 1,its first action upon nearing the end of its stroke is to compress thevalve-actuating spring 35. This pressure, transmitted to the outer endof the valve and acting upon the cam -surfaces as of the dog, tends tothrow the dogs inward. The head 50, however, is in position to re strainthe dogs. As the pistons advance continues, its hub 20 engages the'arms'53 of the cross head. The pin 5 and cross head being secured together,the pin is moved axially outward, the rod 33 being held stationary andthe spring 52 being comtill) pressed. When the head of the pin has hillpressure of the spring 35 transmitted through the valve 3, as notedabove, the

latter acting upon the cam surface 43 of the dogs. This permits partialclosure of the valve 3, and when the dogs have moved in the: rod 33.,Preliminary partial closure of the valve decreases the distance to betravelled finally, and conse uently the time of closure, greatlyincreasing the meters accuracy at high speeds.

Reversal of the valve at the opposite end '.causes the subsequentmovement inward 0t the pin 5 at this end, through the medium of theresilient connection of the cross head arms 53 and rod 33. When thevalve is in its reversed position the dogs 4' will be thrown outwardinto valve-holding position and the head 50will be moved into positiontolock the dogs thus. Upon reversal of the valves the piston reversesits direction ofmovement and the operation is repeated at the o positeend.

If it is desired toadjust the point of reversal of the valves this maybe accomplished by removing a small plug 19 from the cap 16 andinserting a screw driver into a slot 51 in the end of the head 50. Byturning the in 5 in one direction or the other the position of the crosshead 53. is adjusted relative to the valve 3. This varies the positionof the head 50 relative to the dogs 4 and thus controls the point ofreversal of the piston 2 and the valves. What I claim as my inventionis:

1. In a fluid meter including a cylinder, a piston reciprocable therein,and a control valve, the combination therewith of valve controllingmeans comprising dogs engageable withthe valve to hold it in exhaustposition, a pin independent of an engageable with said dogs to lock themin valve-holding position, said pin being engageable by the piston as itadvances to release said dogs, and means operable upon release of saiddogs to reverse the valve.

2. In a fluid meter including a cylinder, 9. piston reciprocabletherein, and a control valve, the combination therewith of valvecontrolling means comprising dogs, engageable with the valve to hold itin exhaust position, a pin independent of and engageable with said dogsto lock them in valveholding position, said pin being engageable by thepiston as it advances to release said dogs, means operable upon releaseof said dogs to reverse the valve, the valve a d valve-controlling meansbeing duplicated at the opposite end of the cylinder, the duplicatevalves and valve-controlling means heing reversely positioned, and atension member connecting the valves at opposite ends of the cylinder.

3. In a fluid meter including a cylinder, a piston reciprocable therein,and a control valve, the combination therewith of valve controllingmeans comprising dogs engage able with said valve to hold it in exhaustposition, a pin having an enlarged head en gageable with said" dogs tothrow them outward into valve-holding position and to lock them thus,said pin being movable by the piston in its advance to release .saiddogs, and means operable upon release of said dogs to reverse the valve.

4. In a fluid meter including a cylinder, a piston reciprocable therein,and a control valve, the combination therewith of valve controllingmeans comprisin dogs on ageable'with said valve to hol it in ex austposition, pin having an enlarged head engageable with said dogs to throwthem cute ward into valve-holding position and to lock them thus, saidpin being movableaxially of the cylinder by the piston as it advancestorelease said dogs, a spring compressible by the pistons advance andoperable upon release of saiid dogs to reverse'the valve and said dogs.

5. In a fluid meter including a cylinder, a piston reciprocable therein,and a control valve at one end thereof, the combination therewith ofvalve controlling meanscomprising dogs en/gageable with the valve tohold it in exhaust position, a pin independ-.

ent of and engageable with said dogs to lock them in valve-holdingposition, a spring engaging said pinand tending to hold it in lockinposition, said pin being. engageable by it e piston as it advances torelease said dogs, and means operable upon release of said dogs toreverse the valve and valvecontrolling means, the .valve andvalvecontrolling'means being duplicated at the opposite end of thecylinder, the duplicate members being reversely positioned, and a rodconnecting the valves at opposite ends ofthe cylinder.

6. In combination in a fluid meter, a cylinder having axially alinedinlet and exhaust ports at each end, a piston reciprocable insaidcylinder, a tubular valve for the ports at each end and reversible-inposition, said valves at opposite ends being reversed in position, a rodto which both of said valves are secured, the ends of said rod having anaxially-extending socket and a transversely-extending slot, andduplicate valve-operating and controlling mechanisms for each end of thecylinder, each corn rising dogs. engageable with the valve to old it inexhaust position, a pin projeetible from said'socket in the end of therod and engageable with saiddogs to lock them in valve-holding position,a cross-head secured upon said pin and having arms projecting throughsaid slot in the rod into the path the ports at each end and reversiblein position, said valves at opposite ends being reversed in position, arod to which both of said valves are secured, the ends ofsaid rod havingan axially-extending socket and a transversely-extending slot, andduplicate valve-operating and controlling mechanisms for each end of thecylinder, each comprising dogs engageable with the valve to hold it inexhaust position, a pin projectable from said socket in the end of therod and engageable with said dogs to lock them in valve-holdingposition, resilient means tending to retract the pin into its socket. across-head secured upon said pin and having arms projecting through saidslot in the rod into the path of the piston to be engaged to release thedogs by the pistons advance, and means operable through the advance ofthe piston for reversing the positions of said valves and dogs.

8. In combination in a fluid meter, a cylinder having axially alinedinlet and exhaust ports at each end, a piston reciprocable in saidcylinder, a tubular valve for the ports at each end and reversible inposition, said valves at opposite ends being reversed in position, a rodto which both of said valves are secured, the end of said rod having anaxially-extending socket and a transversely-extending slot, andduplicate valve-operating and controlling mechanisms for-each-end of thecylinder, each comprising dogs engageable with the valve to hold it infrom said socket in the} end of the rod and engageable with said dogs tolock them in valve-holding position, a cross-head secured upon said pinand having arms projecting through said slot in the rod into the path ofthe piston to be engaged to release the dogs by the pistons advance, aspring engaging said cross-head arms to retain the pin projected intoits socket, and means -operable through the advance of the piston forreversing the positions of said valves and dogs. 7

'9. In a fluid meter including a cylinder,

haust position; a pin projectible a piston reciprocable therein, acontro valve at each end of the cylinder, and a rod-connecting thevalves which are at opposite ends of the cylinder, valve controllingmechanism for each valve comprising a pin ieciprocable relative to saidrod'and having ahead on its outer end, dogs interposed between said headand the valve and engageable with the valve to hold it in exhaustposition, the head then engaging the dogs to lock them in valve-holdingposition, a cross-head adjustably secured upon the inner end of saidpin, said cross-head being engageable by the piston as' it ad- ,vanresto thereby release said dogs, and

means operable upon release of the dogs to reverse the valve and valvecontrolling mechanism at each end of thecylinder.

10. In a fluid meter including a cylinder, a piston therein, a .fluidcontrol'valve for each end of the cylinder and means connecting saidvalves to 'move together, the combination therewith of a springcompressi:

ble by the piston inits advance to close the valve, a dog engageablewith the'valve by inclined surfaces to hold the valve open, and a doglocking member movable immediatelyiollowing actuation of the valve toengage the dog in valve-holding position and movable by the piston torelease the 'dog.

1 1. In a cylinder and piston meter, a spring-actuated reciprocatingvalve, a valve holding dog, said dog and valve having inclined holdingsurfaces, and a dog-retaining member controlled in its position bymovement of the meter piston.

12. In a meter including a cylinder and a piston therein, areciprocating fluid controlling valve, a valve actuating spring betweenthe valve and piston, a valve holding dog, said dog and valve havinginclined engaging surfaces, and a dog retaining memberadapted to holdthe dog in valve-o en position, and means for shifting said 0;:retaining member to release the dog. A

11:}. Ina meter including a cylinder and a piston therein, areciprocating fluid controlling valve, a valve actuating spring be

